/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "SF Pro", "PingFang SC", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f7;
    padding: 0 1rem;
}

header {
    background-color: #007AFF;
    color: white;
    padding: 1.5rem;
    text-align: center;
}

header h1 {
    margin-bottom: 1rem;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
}

nav a:hover {
    text-decoration: underline;
}

main {
    max-width: 800px;
    margin: 2rem auto;
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

article h2 {
    color: #007AFF;
    margin-bottom: 1rem;
}

article p {
    margin-bottom: 1rem;
}

article img {
    border-radius: 8px;
    margin: 1rem 0;
}

article ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

footer {
    text-align: center;
    padding: 1.5rem;
    background-color: #007AFF;
    color: white;
    margin-top: 2rem;
}